Agricultural alternatives and nutritional self-sufficiency : for a sustainable agricultural system that respects man and his environment : proc of the IFOAM Seventh Int Scientific Conference, Ouagadougou, January 2-5, 1989.

Agricultural alternatives and nutritional self-sufficiency : for a sustainable agricultural system that respects man and his environment : proc of the IFOAM Seventh Int Scientific Conference, Ouagadougou, January 2-5, 1989.

Agricultural alternatives and nutritional self-sufficiency : for a sustainable agricultural system that respects man and his environment : proc of the IFOAM Seventh Int Scientific Conference, Ouagadougou, January 2-5, 1989.

Agricultural alternatives and nutritional self-sufficiency : for a sustainable agricultural system that respects man and his environment : proc of the IFOAM Seventh Int Scientific Conference, Ouagadougou, January 2-5, 1989.

Agricultural alternatives and nutritional self-sufficiency : for a sustainable agricultural system that respects man and his environment : proc of the IFOAM Seventh Int Scientific Conference, Ouagadougou, January 2-5, 1989.